We have a number of software updates that need to be applied as well as some new functionality being added. The most noticeable change will be the requirement of being friends before someone can send you a private message. This will no longer be a requirement. After the update anyone will be able to send you a message but if they are not on your friends list you will get a friend request with an option to preview their message. If you accept their friendship request you will then be added to the conversation started by your new friend. If you do not accept their friendship request they’ll be left alone, talking to themselves. (tina will not be amused)
Also, the pagination for topics and replies will be placed at the top of the page as well as the bottom. Actually I guess this would be the most noticeable change.
I expect the site to be closed for no more than an hour unless all goes well then around 15 to 20 minutes. I did not encounter any major sticking points while upgrading our staging environment so the production will hopefully go quickly.